Backend Developer Work Modality

Barcelona - Hybrid (3 days per week on-site)

Schedule

Full-time

Contract type

Indefinite

Brief Description We are looking for a

Backend Developer to join our team and contribute to the development of our next-generation project repository. If you are passionate about scalable architectures, cloud services, and high-performance backend solutions, this is an opportunity to work on cutting-edge technology in the blockchain and fintech space.

Key Responsibilities

Backend Development

Design, develop, and maintain backend services and APIs using

Node.js, TypeScript , and serverless frameworks .

Integration with AWS Services

Implement integrations with AWS services such as

SNS, SQS, API Gateway , and

Lambda functions .

Database Management

Manage and optimize

PostgreSQL databases using

Sequelize ORM and

Sequelize TypeScript .

Performance Optimization

Identify and resolve performance bottlenecks, implement caching mechanisms, and ensure optimal response times for backend services.

Serverless Deployment

Deploy and manage serverless applications using

Serverless Framework and esbuild for efficient bundling.

DevOps & Tooling:

Work with

CI/CD pipelines , automate infrastructure provisioning, and ensure effective monitoring and logging of backend systems.

Testing & Quality Assurance:

Write unit tests, integration tests , and participate in code reviews to maintain high code quality and reliability.

Documentation & Collaboration:

Contribute to technical documentation , mentor junior developers, and collaborate closely with frontend and cross-functional teams .

Requirements

Bachelor’s or Master’s degree in

Computer Science, Engineering , or a related field.

2+ years of experience as a

Backend Developer .

Strong knowledge of

Node.js, TypeScript , and modern backend technologies.

Proficiency in

PostgreSQL and





Sequelize ORM with TypeScript .

Familiarity with serverless architectures and deployments using

Serverless Framework .

Strong understanding of design patterns, SOLID principles , and backend development best practices.

Excellent problem-solving skills and ability to work in a fast-paced, collaborative environment .

Intermediate English level .

Bonus Points

AWS certification

(e.g., AWS Certified Developer - Associate).

Experience in building and maintaining scalable and distributed systems .

Knowledge of event-driven architectures using AWS

SNS, SQS , and event sourcing patterns .

Contributions to open-source projects or active participation in developer communities .

If you are looking for a challenge in backend development, working with scalable, high-performance architectures , and cloud-native technologies , we would like to hear from you.

AI and Blockchain knowledge or interest.

Soft Skills

Problem Solving

Teamwork & Collaboration

Communication Skills

Adaptability & Continuous Learning

Mentoring & Knowledge Sharing

Company Benefits

Hybrid work model and flexible hours.

Worldwide telework for 4 weeks per year.

Health coverage

Compensation and benefits package

Birthday day off

Wellness programs

Why Brickken?

Rebuilding at Its Core: Innovation alone is not enough to describe our daily tasks, as we aim to be better than we were yesterday. We have the ability to question and enhance our work continuously.

General Impact: Your work will cross borders and transform the vision of the fintech landscape on a global scale.

Growth and Learning: We foster an environment of continuous learning and personal development.

Teambuilding: Being united is the most important thing for us, which is why we organize internal workshops.

Startup Environment & Collaborative Culture: You'll be part of a dynamic international team ( +10 nationalities) that values creativity, diversity, and inclusivity.

📌 Backend Developer (Madrid)
🏢 Brickken
📍 Madrid